GB/CA/1910, Great Britain Armoured Cruiser laid down 1910
Displacement:
13,402 t light; 13,973 t standard; 16,000 t normal; 17,622 t full load
Dimensions: Length overall / water x beam x draught
538.36 ft / 535.00 ft x 70.00 ft x 25.00 ft (normal load)
164.09 m / 163.07 m x 21.34 m x 7.62 m
Armament:
8 - 9.20" / 234 mm guns (4x2 guns), 389.34lbs / 176.60kg shells, 1910 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
16 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1910 Model
Quick firing guns in casemate mounts
on centreline, all forward, 8 raised mounts - superfiring
Weight of broadside 3,627 lbs / 1,645 kg
Shells per gun, main battery: 120
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 390.00 ft / 118.87 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 112 % of normal length
- Torpedo Bulkhead:
1.50" / 38 mm 390.00 ft / 118.87 m 23.00 ft / 7.01 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 5.00" / 127 mm 8.00" / 203 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armour deck: 3.00" / 76 mm, Conning tower: 8.00" / 203 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 64,143 shp / 47,851 Kw = 27.00 kts
Range 7,200nm at 15.00 kts
Bunker at max displacement = 3,649 tons
Complement:
710 - 924
Cost:
£1.221 million / $4.884 million
Distribution of weights at normal displacement:
Armament: 453 tons, 2.8 %
Armour: 5,416 tons, 33.8 %
- Belts: 2,227 tons, 13.9 %
- Torpedo bulkhead: 498 tons, 3.1 %
- Armament: 1,064 tons, 6.6 %
- Armour Deck: 1,518 tons, 9.5 %
- Conning Tower: 109 tons, 0.7 %
Machinery: 2,651 tons, 16.6 %
Hull, fittings & equipment: 4,883 tons, 30.5 %
Fuel, ammunition & stores: 2,598 tons, 16.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,724 lbs / 9,854 Kg = 55.8 x 9.2 " / 234 mm shells or 3.5 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 4.2 ft / 1.3 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.37
Seaboat quality (Average = 1.00): 1.06
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.598
Length to Beam Ratio: 7.64 : 1
'Natural speed' for length: 23.13 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 3.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 24.00 ft / 7.32 m
- Mid (35 %): 24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 18.96 ft / 5.78 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106.3 %
- Above water (accommodation/working, high = better): 130.9 %
Waterplane Area: 27,342 Square feet or 2,540 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 118 lbs/sq ft or 576 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.49
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
This is a forum for discussion of topics relating to the Dreadnought era, prior to the ascendency of naval aviation. We will be discussing history, ship design, and naval wargaming.
Monday, October 24, 2005
A pretty good GB/CA/1910 armoured cruiser
A purpose-built British armoured cruiser with guns in echelon works quite well. The armament is 8-9.2in BLR and 16-4in QF guns. The armour basis is 9in with a 3in deck. The speed is an acceptable 27 knots. This is the Springsharp report:
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